Filtering tank



Jan. 18, 192?.

L. COBB FILTERING TANK` Filed lay 6. 1926 Patented 18,192.7.v

UNITED's'rAfrEsl PATENT OFFICE..

" LONII: COBB', or HAMMOND, INDIANA, AssIoNOn 'ro oaAvEB. CORPORATION,or EAsr cnrcAoo, INDIANA, A CORPORATION OF ILLINOIS.

FILTERING TANK.

Application led May 6,

My invention relates to tanks employing that are preferably in the formof tongues whch'are carried by the medium support- -ing plateof suchata'nk, each tongue having a portion unconnected with the plateA and inregister with an opening and being spaced apart from the plate to afforda passage communicating with said opening between the plate andtongue.In the preferred embodiment of the invention the tongues are integrallyformed with the plates by being struck therefrom, each tongue having anunconnected portion spaced apart from the medium supporting plate to anextent to afford a passage communicating `with said opening between theplate and tongue that-'is nar rower than the opening. In the case offilters the portion 'of the filtering medium directly overlying thefiltering plate is desirably composed of gravel that is toolarge toenter the spaces between the tongues and plate so that the openings inthe plate for the passage of the liquid may not be clogged by thefiltering medium.

I will explain my inventionmore Afully by reference to the accompanyingdrawing. in which Fig. 1 is a sectional elevation of a ltering tankequipped in accordance with the preferred embodiment of the invention;Fig. 2 is a sectional plan view on line 2-.2 of Fig. 1; Fig. 3 is a planview, on a lar er scale, of a portion of the ilteringplate; ig. 4 is asectional Aview on line 4-4 of Fig. l3; Fig. 5 is a sectional view online 5-5 of Fig. 4; and Fig. 6 is a perspective view of the portionshown in Fig. 3.

The tank 1 is provided with top and bottom walls 2 and 3 and a plate 4at the bottom of the tank a short distance .above the tank bottom. Theplate h-as guards 5,l preferabl in the form of.- tongues which arestruck7 upwardly therefrom, each tongue having a portion unconnectedwith the plate and overlying and in register with the opening 6 left inthe plate due to the formation -of the tongue and spaced apart from theplate to an extent to afford a passage 7 com- 1926. Serial No. 107,070.

municating with said opening between the plate and tongue that isnarrower than the opening. In the case of a filter, the filtering medium8 is preferably graded from sand at the top to coarse gravel at thefiltering plate, this gravel being of such size that it cannot enter thespaces 7 whereby the openings 6 will not become clogged. The liquid tobe treated is received through a supply pipe 9 which discharges into thevspace between the top of the tank and the filtering or otliermedium,and 'passes downwardly through this medium and through the passages 7and openings 6 into the space between the medium supporting plate andthe bottoni of the tank from whence it may be withdrawn Vfor use infiltered or treated condition through the pipe l0. The medium upon thelate 4 may be cleansed by causing cleansefor softened water to passupwardly through the plate and the medium thereon.

Having thus described my invention, I claim 1. A tank having a plate insupporting -relation to a liquid treating medium within the tank andhaving guards struck therefrom, each guard having a portion unconnectedwith theplate in register with the opening left in the plate dueto theformation of the guard and being spaced apart from the plate to anextentY to afford a passage communicating with said opening between' theplate and guard that is narrower than the o ening.

2. A tan having a plate in supporting relation to a liquid treatingmedium within the tank and having guards struck therefrom, each guardhaving a portion unconnected with the plate in register with the openinleft in the plate due to the forma- 3. A tank having a plate insupporting relation to a liquid treating medium within the tank and.carrying guards, each guard having a portlon unconnected with the platein register with an opening and being spaced apart from the plate to anextent .to afford aA passage communicating with said opening between theplate and guard that is narrower apart from the plate to afford apassage comthan, the opening. municating with said opening between the41A tank having a plate in supporting plat-e and guard.l r 10 relationto a liquid treating medium within 1n witness whereof; I hereuntosubscribe 5 the-tank and carrying guards,'each guard my name.

having a portion unconnected with the plate in register with an openingand being spaced LONIE COBB.

